Photoacoustic study of the effect of hydroxyl ion on thermal diffusivity of γ alumina | Zendy

S. Raman | Zendy; V. P. N. Nampoori | Zendy; C. P. G. Vallabhan | Zendy; G. Ambadas | Zendy; S. Sugunan | Zendy

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Photoacoustic study of the effect of hydroxyl ion on thermal diffusivity of γ alumina

Author(s) -

S. Raman,

V. P. N. Nampoori,

C. P. G. Vallabhan,

G. Ambadas,

S. Sugunan

Publication year - 1999

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.369193

Subject(s) - thermal diffusivity , photoacoustic imaging in biomedicine , doping , oxide , ion , inorganic chemistry , materials science , chemistry , thermal , photoacoustic effect , analytical chemistry (journal) , mineralogy , thermodynamics , organic chemistry , optics , physics , optoelectronics

The effect of the chemisorbed hydroxyl groups on the thermal diffusivity of γ alumina is determined by evaluating the thermal diffusivity at various degassing temperatures and by doping it with rare earth oxide using photoacoustic technique. The thermal diffusivity is found to decrease with the increase in degassing temperature as well as with the increase in the doping concentration of rare earth oxide. This decrease has been attributed to the loss of hydroxyl ion from the γ-Al2O3.

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